Product Description
The High velocity Water Spray System has been developed for the
extinguishments of oil fines, and it introduces an entirely new
principle in fire extinguishments. It is employed to bring about a
fundamental change in the nature of the inflammable liquid, which
is converted temporarily into an emulsion which cannot burn.
A special type of nozzle, termed a projector, is employed,
discharging a cone of water in the form of evenly distributed
broken streams of high velocity and high momentum. The rapid
movement of the broken streams of water is suddenly arrested at the
oil surface and the impact causes the oil to be broken up into tiny
globules to form an emulsion with the water. In this manner, almost
immediately the water from the projector strikes the burning
oil-in-water emulsion is formed which cannot burn.
In addition, the dispersion of the oil in minute globules in the
water gives almost instantaneous cooling and thus, together with
the extinguishments of the fire, there is simultaneous cessation of
the formation of oil vapour.
When an emulsion formed by the "High Velocity Water Spray" system
is allowed to rest for a considerable period of time, the oil and
water will separate. Such an emulsion is said to be unstable. It
must be realized, however, that most emulsions formed by the "High
Velocity Water Spray" system, although not stable (or permanent),
remain emulsions for a sufficient length of time to prevent
recurrence of ignition after the water discharge has ceased.
With the "High Velocity Water Spray" System, fires of all light
mineral spirits such as petrol, paraffin, benzene and white spirit
can be extinguished, but whereas the emulsions formed with the
heavier oils persist for sometime, those formed with the light
spirits are transient.
For this reason, complete extinguishments of the light mineral
spirit cannot be assured unless the whole of the burning surface is
brought under simultaneous bombardment from the projectors. It will
be appreciated that such a state of affairs is not always possible,
for even with the ideal design of protection the fire may be
preceded by an explosion causing disarrangement of the plant and
some shielding of the burning liquids. On this account the "High
Velocity Water Spray" system can only be put forward in such cases
after a full enquiry into all the circumstances.
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Model No: |
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FOB Price: |
(Negotiable)
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